david petraeus's testimony on the hill ends a week with heated word for the u.s. ambassador to the u.n. and an equally heated defense of her by president obama. >> for them to go after the u.n. ambassador who had nothing to do with benghazi and was simply making a presentation based on intelligence that she had received and to besmurge her reputation is outrageous. >> by the way, i'm not taking anybody on. the american people have lost four brave americans. we owe to their families and other americans. the president of united states for two weeks afterwards to deny that was the case is either a cover-up or it is incompetent. either one of the two. >> he made it clear that there was significant terrorism involvement, and that is not my recollection of what he told us on september 14th. >> he put together information. he personally didn't breech susan rice. >> joining me is mark murray. we know that the week started with this scandal with david petraeus's affair. that's taken a back seat, probably rightfully so, to the president's first press conference, his first n